Morphology and Structure of Crystalline/Crystalline Polymer Blends

Qiu, Zhaobin; Yan, Shouke

doi:10.1002/9783527653966.ch3

Cited by 3 publications

(1 citation statement)

References 95 publications

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“…Crystalline/crystalline blends show much more complicated properties and morphology than other binary polymer blends due to the effect of blend composition, melting temperature difference between components and cooling rate on crystallinity of components; each component can affect the size of the spherulites and the crystallinity intensity of another component 4,5 . For such a blend, the crystallization behavior of the system is significantly controlled by the difference in melting temperature of the components (Δ T m ).Typically, two crystalline components with low Δ T m crystallizesimultaneously, 6,7 while high Δ T m leads to the stepwise crystallization of the components in the blend 3,8–12 .…”

Section: Introductionmentioning

confidence: 99%

Impact of poly(ε‐caprolactone) on the thermal, dynamic‐mechanical and crystallization behavior of polyvinylidene fluoride/poly(ε‐caprolactone) blends in the presence of KIT‐6 mesoporous particles

Fakhri

Monem

Sadeghi

et al. 2021

Polymers for Advanced Techs

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Acquiring a polymeric nanocomposite with biocompatibility, desirable dynamic‐mechanical‐thermal properties, and piezoelectricity, as well as high loading capacity, is challenging for design polymeric systems with potential applications in tissue engineering and biosensing. In this work, polyvinylidene fluoride (PVDF), poly(ε‐caprolactone) (PCL), and KIT‐6 mesoporous silica particles were used to prepare PVDF/PCL blends and their nanocomposites as potential candidates to meet the characteristics mentioned above. Hence, we deeply investigated the effect of the addition of PCL and KIT‐6 on the compatibility, crystallinity, and engineering properties of immiscible PVDF/PCL blends. PVDF/PCL blends without KIT‐6 particles and 75/25 PVDF/PCL blend containing various amounts of KIT‐6 particles were prepared by solution casting/annealing technique. It was found that PCL decreased the crystallization temperature and melting points of the PVDF component in the blends. The crystallinity and β‐phase content of PVDF reached maximum values for 75/25 PVDF/PCL blend; interestingly, KIT‐6 prevented PVDF crystallization and decreased β‐phase content. The results of thermogravimetric analysis and dynamic‐mechanical thermal analysis revealed that the presence of PCL reduced the thermal stability of the blends. On the other hand, KIT‐6 increased the thermal decomposition temperature and storage modulus of the polymeric matrix.

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Section: Introductionmentioning

confidence: 99%

Impact of poly(ε‐caprolactone) on the thermal, dynamic‐mechanical and crystallization behavior of polyvinylidene fluoride/poly(ε‐caprolactone) blends in the presence of KIT‐6 mesoporous particles

Fakhri

Monem

Sadeghi

et al. 2021

Polymers for Advanced Techs

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Manipulating crystallization behavior of poly(ethylene oxide) by functionalized nanoparticle inclusion

Zhao

Wen

et al. 2019

Polymer

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Double Spherulite Formation via Two-Step Crystallization in PTT/PET Blends

Sugeno,

Saito

2024

Polymers

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We investigated the crystallization kinetics and morphology evolution of miscible crystalline/crystalline blends of poly(trimethylene terephthalate) (PTT) and poly(ethylene terephthalate) (PET) during isothermal melt crystallization. The integrated light-scattering intensity and the spherulite size increased gradually and then steeply as crystallization progressed in 70/30 PTT/PET at 215 °C, indicating the two-step crystallization behavior. The compact PET spherulite grew in the first step, and the dendritic PTT spherulite grew in the second step, forming the double spherulite consisting of a PET component in the inner region and a PTT one in the outer region. The spherulite size of PET increased nonlinearly with time, suggesting the exclusion of PTT from the crystal growth front. Atomic force microscopy (AFM) observation revealed that the PTT fibrils were interfiled within the PET spherulite in the inner region and continued outward to the outer region consisting of the PTT spherulite. These results suggest that the excluded PTT crystallizes into fibrils by interfiling crystallization within the inner PET spherulite, and then the interfiled PTT fibrils continue to grow outward to form the outer dendritic PTT spherulite after the spherulite growth of PET stops due to the excluded PTT at the growth front.

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Morphology and Structure of Crystalline/Crystalline Polymer Blends

Cited by 3 publications

References 95 publications

Impact of poly(ε‐caprolactone) on the thermal, dynamic‐mechanical and crystallization behavior of polyvinylidene fluoride/poly(ε‐caprolactone) blends in the presence of KIT‐6 mesoporous particles

Impact of poly(ε‐caprolactone) on the thermal, dynamic‐mechanical and crystallization behavior of polyvinylidene fluoride/poly(ε‐caprolactone) blends in the presence of KIT‐6 mesoporous particles

Manipulating crystallization behavior of poly(ethylene oxide) by functionalized nanoparticle inclusion

Double Spherulite Formation via Two-Step Crystallization in PTT/PET Blends

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